반응형
MSSQL DB 서버를 이전할 때, 데이터베이스와 별개로 로그인 정보를 함께 이전해야 할 경우가 종종 있다. 그러나 패스워드는 해시값으로 저장되기 때문에, 이전할 서버에서 동일한 패스워드를 생성하는 것이 쉽지 않다. 이때, sp_help_revlogin 프로시저를 사용하면 로그인 정보를 백업하고, 이를 통해 필요한 쿼리문을 생성할 수 있다.
1. sp_help_revlogin 프로시저 생성
쿼리 편집기를 실행하여 프로시저 생성 한다.
USE [master]
GO
IF OBJECT_ID ('sp_hexadecimal') IS NOT NULL
DROP PROCEDURE sp_hexadecimal
GO
CREATE PROCEDURE [dbo].[sp_hexadecimal]
(
@binvalue varbinary(256),
@hexvalue varchar (514) OUTPUT
)
AS
BEGIN
DECLARE @charvalue varchar (514)
DECLARE @i int
DECLARE @length int
DECLARE @hexstring char(16)
SELECT @charvalue = '0x'
SELECT @i = 1
SELECT @length = DATALENGTH (@binvalue)
SELECT @hexstring = '0123456789ABCDEF'
WHILE (@i <= @length)
BEGIN
DECLARE @tempint int
DECLARE @firstint int
DECLARE @secondint int
SELECT @tempint = CONVERT(int, SUBSTRING(@binvalue,@i,1))
SELECT @firstint = FLOOR(@tempint/16)
SELECT @secondint = @tempint - (@firstint*16)
SELECT @charvalue = @charvalue + SUBSTRING(@hexstring, @firstint+1, 1) + SUBSTRING(@hexstring, @secondint+1, 1)
SELECT @i = @i + 1
END
SELECT @hexvalue = @charvalue
END
go
IF OBJECT_ID ('sp_help_revlogin') IS NOT NULL
DROP PROCEDURE sp_help_revlogin
GO
CREATE PROCEDURE [dbo].[sp_help_revlogin]
(
@login_name sysname = NULL
)
AS
BEGIN
DECLARE @name SYSNAME
DECLARE @type VARCHAR (1)
DECLARE @hasaccess INT
DECLARE @denylogin INT
DECLARE @is_disabled INT
DECLARE @PWD_varbinary VARBINARY (256)
DECLARE @PWD_string VARCHAR (514)
DECLARE @SID_varbinary VARBINARY (85)
DECLARE @SID_string VARCHAR (514)
DECLARE @tmpstr VARCHAR (1024)
DECLARE @is_policy_checked VARCHAR (3)
DECLARE @is_expiration_checked VARCHAR (3)
Declare @Prefix VARCHAR(255)
DECLARE @defaultdb SYSNAME
DECLARE @defaultlanguage SYSNAME
DECLARE @tmpstrRole VARCHAR (1024)
IF (@login_name IS NULL)
BEGIN
DECLARE login_curs CURSOR
FOR
SELECT p.sid, p.name, p.type, p.is_disabled, p.default_database_name, l.hasaccess, l.denylogin, p.default_language_name
FROM sys.server_principals p
LEFT JOIN sys.syslogins l ON ( l.name = p.name )
WHERE p.type IN ( 'S', 'G', 'U' )
AND p.name <> 'sa'
ORDER BY p.name
END
ELSE
DECLARE login_curs CURSOR
FOR
SELECT p.sid, p.name, p.type, p.is_disabled, p.default_database_name, l.hasaccess, l.denylogin, p.default_language_name
FROM sys.server_principals p
LEFT JOIN sys.syslogins l ON ( l.name = p.name )
WHERE p.type IN ( 'S', 'G', 'U' )
AND p.name = @login_name
ORDER BY p.name
OPEN login_curs
FETCH NEXT FROM login_curs INTO @SID_varbinary, @name, @type, @is_disabled, @defaultdb, @hasaccess, @denylogin, @defaultlanguage
IF (@@fetch_status = -1)
BEGIN
PRINT 'No login(s) found.'
CLOSE login_curs
DEALLOCATE login_curs
RETURN -1
END
SET @tmpstr = '/* sp_help_revlogin script '
PRINT @tmpstr
SET @tmpstr = '** Generated ' + CONVERT (varchar, GETDATE()) + ' on ' + @@SERVERNAME + ' */'
PRINT @tmpstr
PRINT ''
WHILE (@@fetch_status <> -1)
BEGIN
IF (@@fetch_status <> -2)
BEGIN
PRINT ''
SET @tmpstr = '-- Login: ' + @name
PRINT @tmpstr
SET @tmpstr='IF NOT EXISTS (SELECT * FROM sys.server_principals WHERE name = N'''+@name+''')
BEGIN'
Print @tmpstr
IF (@type IN ( 'G', 'U'))
BEGIN -- NT authenticated account/group
SET @tmpstr = 'CREATE LOGIN ' + QUOTENAME( @name ) + ' FROM WINDOWS WITH DEFAULT_DATABASE = [' + @defaultdb + ']' + ', DEFAULT_LANGUAGE = [' + @defaultlanguage + ']'
END
ELSE
BEGIN -- SQL Server authentication
-- obtain password and sid
SET @PWD_varbinary = CAST( LOGINPROPERTY( @name, 'PasswordHash' ) AS varbinary (256) )
EXEC sp_hexadecimal @PWD_varbinary, @PWD_string OUT
EXEC sp_hexadecimal @SID_varbinary,@SID_string OUT
-- obtain password policy state
SELECT @is_policy_checked = CASE is_policy_checked WHEN 1 THEN 'ON' WHEN 0 THEN 'OFF' ELSE NULL END
FROM sys.sql_logins
WHERE name = @name
SELECT @is_expiration_checked = CASE is_expiration_checked WHEN 1 THEN 'ON' WHEN 0 THEN 'OFF' ELSE NULL END
FROM sys.sql_logins
WHERE name = @name
SET @tmpstr = 'CREATE LOGIN ' + QUOTENAME( @name ) + ' WITH PASSWORD = ' + @PWD_string + ' HASHED, SID = '
+ @SID_string + ', DEFAULT_DATABASE = [' + @defaultdb + ']' + ', DEFAULT_LANGUAGE = [' + @defaultlanguage + ']'
IF ( @is_policy_checked IS NOT NULL )
BEGIN
SET @tmpstr = @tmpstr + ', CHECK_POLICY = ' + @is_policy_checked
END
IF ( @is_expiration_checked IS NOT NULL )
BEGIN
SET @tmpstr = @tmpstr + ', CHECK_EXPIRATION = ' + @is_expiration_checked
END
END
IF (@denylogin = 1)
BEGIN -- login is denied access
SET @tmpstr = @tmpstr + '; DENY CONNECT SQL TO ' + QUOTENAME( @name )
END
ELSE IF (@hasaccess = 0)
BEGIN -- login exists but does not have access
SET @tmpstr = @tmpstr + '; REVOKE CONNECT SQL TO ' + QUOTENAME( @name )
END
IF (@is_disabled = 1)
BEGIN -- login is disabled
SET @tmpstr = @tmpstr + '; ALTER LOGIN ' + QUOTENAME( @name ) + ' DISABLE'
END
SET @Prefix = '
EXEC master.dbo.sp_addsrvrolemember @loginame='''
SET @tmpstrRole=''
SELECT @tmpstrRole = @tmpstrRole
+ CASE WHEN sysadmin = 1 THEN @Prefix + [LoginName] + ''', @rolename=''sysadmin''' ELSE '' END
+ CASE WHEN securityadmin = 1 THEN @Prefix + [LoginName] + ''', @rolename=''securityadmin''' ELSE '' END
+ CASE WHEN serveradmin = 1 THEN @Prefix + [LoginName] + ''', @rolename=''serveradmin''' ELSE '' END
+ CASE WHEN setupadmin = 1 THEN @Prefix + [LoginName] + ''', @rolename=''setupadmin''' ELSE '' END
+ CASE WHEN processadmin = 1 THEN @Prefix + [LoginName] + ''', @rolename=''processadmin''' ELSE '' END
+ CASE WHEN diskadmin = 1 THEN @Prefix + [LoginName] + ''', @rolename=''diskadmin''' ELSE '' END
+ CASE WHEN dbcreator = 1 THEN @Prefix + [LoginName] + ''', @rolename=''dbcreator''' ELSE '' END
+ CASE WHEN bulkadmin = 1 THEN @Prefix + [LoginName] + ''', @rolename=''bulkadmin''' ELSE '' END
FROM (
SELECT CONVERT(VARCHAR(100),SUSER_SNAME(sid)) AS [LoginName],
sysadmin,
securityadmin,
serveradmin,
setupadmin,
processadmin,
diskadmin,
dbcreator,
bulkadmin
FROM sys.syslogins
WHERE ( sysadmin<>0
OR securityadmin<>0
OR serveradmin<>0
OR setupadmin <>0
OR processadmin <>0
OR diskadmin<>0
OR dbcreator<>0
OR bulkadmin<>0
)
AND name=@name
) L
PRINT @tmpstr
PRINT @tmpstrRole
PRINT 'END'
END
FETCH NEXT FROM login_curs INTO @SID_varbinary, @name, @type, @is_disabled, @defaultdb, @hasaccess, @denylogin, @defaultlanguage
END
CLOSE login_curs
DEALLOCATE login_curs
RETURN 0
ENDmaster DB에 sp_hexadecimal, sp_help_revlogin 두 프로시저가 생성된다.
2. 로그인 정보 생성
EXEC sp_help_revloginsp_help_revlogin 저장 프로시저가 생성하는 출력 스크립트는 로그인 정보를 생성하는 스크립트다. 이 스크립트를 통해 원래 사용자가 사용하던 암호로 로그인 정보를 동일하게 생성할 수 있다.
출력 예시
-- Login: gbminnote
IF NOT EXISTS (SELECT * FROM sys.server_principals WHERE name = N'gbminnote')
BEGIN
CREATE LOGIN [gbminnote] WITH PASSWORD = 0x0200ED5342184BC3109C56E800D93AF76DB7FA97261AC7A4C71945CBFDC80A2C1F51C40F4BF2840C7A0EC2B293CE2C72927970DC5A2F80F8E2DB14C198BB81CED1756D39FC13 HASHED, SID = 0xB8695E821983854CB05063EA3FA33F89, DEFAULT_DATABASE = [gbminnote], DEFAULT_LANGUAGE = [한국어], CHECK_POLICY = ON, CHECK_EXPIRATION = ON
END이전될 서버에 출력된 CREATE LOGIN 쿼리를 실행하면 로그인 정보이전이 완료된다.
주의할 점은 출력 결과는 서버 내 모든 유저(sa포함)의 정보가 출력되기 때문에 필요한 계정만 선택해서 처리해야 한다.
이외에 주의해야 할 점이 몆 가지 더 있는데 [MS기술문서]에서 더 자세히 볼 수 있다.
